My son recently started a probiotic regimen as recommended by his Functional Medicine Doctor. She wanted him rotating different ones. He is on three: Floristor, Bio-K and Gut Pro Infant probiotic (very expensive). We got these products through recommendations from the doctor and also reading books on the subject.

The BEST book on all of the latest research on autoimmune diseases is The Keystone Approach by Rebecca Fett. I can't say enough about this book and how helpful it is to understand the reasons behind the core causes of autoimmune disease and how to treat it with diet. The book is relevant to RA, AS and Crohn's disease since these are so interrelated. I think I've read 5 books and also numerous papers and articles and this book tops them all.

Best of luck and health,
Lori